Evidently, it was Okieriete's decision to leave the show. He told the producers he was ready to leave at the end of Season 4 but promised to wrap up his character during Season 5. In an interview with Deadline, Station 19 and Grey’s Anatomy executive producer/showrunner Krista Vernoff said, "I am a better artist and human for having had the opportunity to work with Okieriete Onaodowan. I am heartbroken by the loss of Dean Miller and that I no longer get to write for Oak."

Fans have taken to social media to express their deep sadness over the loss of a beloved character. The reactions range from anger to utter despair. You can feel how much of a difference Dean Miller made to the fans of Station 19. They are gutted by his death.

Okieriete also released a statement about his time on the show. "It’s been a pleasure being Dean," he said in a statement to Deadline. "I have Shonda Rhimes, Stacy McKee, Krista Vernoff, Paris Barclay and ABC to thank for allowing me to bring him to life. I am grateful I got to work with the most loving, kind and dedicated crew in network TV. And most importantly, thanks to the fans for showing Dean so much love. I hope he has inspired you to change your world for the better. Be the change!”

Station 19 airs Thursdays at 8 p.m. EST on ABC